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Description

My brother's XBox 360 (phat) decided to start showing the RROD, specifically 2 lights, which means inadequate cooling.
I opened up the 360, removed the old, solidified, thermal compound, applied new goo, and the RROD was gone. But the heat coming off the main heatsink still bothered me - it was running at 80+ C in less than 30 seconds of powering on, in a cold room no less.
Using rgall0's guide here (http://forums.xbox-scene.com/index.php?/topic/549063-add-front-fan-header-to-360-motherboard/), I added a fan to the top of the 360 for more cooling.

I figured I'd provide a write-up with some of the minor notes that I didn't find in the other guides.

Details

The original XBox 360 phat has a notorious cooling problem, which can ultimately cause the dreaded RROD.

The chip beneath the larger heatsink on the 360 seems to generate A LOT of heat, very quickly, so we need more cooling

Early models the 360 phat have an unused header for a 3-pin fan, and the voltage can be selected between 5V and 12V with a simple solder (see guide)

This will add some noise to your 360, but it should help keep the chips cool enough to prevent the RROD